Multi-cell Power Converter with Mode-switching Filter Cell
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Solution Overview
Problem
Existing power conversion methods face challenges in minimizing losses during power conversion, particularly in efficiently converting input power to output power across different voltage levels and topologies.
Innovation Solution
A power converter circuit comprising multiple converter cells and a filter cell, which operates in both input and output power modes, allowing for efficient power conversion by optimizing the operation of converter cells through modulation indices and duty cycles to manage input and output voltages and currents effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple converter cells are used to handle high power conversion, then power conversion capability is improved, but system complexity increases
Solution Approach 1:
The power converter is divided into multiple converter cells (first converter cell, second converter cell, etc.) that can be independently controlled. Each cell handles a portion of the total power conversion, allowing the system to scale power capability by adding cells while maintaining manageable complexity through modular architecture and independent control of each segment.
2Loss of energy
If converter cells operate at high voltage levels, then power conversion efficiency is improved, but safety and control difficulty increase
Solution Approach 1:
High voltage power conversion is achieved by connecting multiple converter cells in series, where each cell operates at a lower, safer voltage level. The cells are controlled independently with individual modulation indices, allowing precise control at reduced voltage per cell while achieving high overall voltage and improved efficiency through optimized power distribution across multiple lower-voltage stages.
3Adaptability or versatility
If filter cell operates in both input and output power modes, then versatility is improved, but control complexity increases
Solution Approach 1:
The filter cell is designed to operate in multiple modes: it can function as an input filter, an output filter, or even as a converter cell depending on operational requirements. This multi-functionality is achieved through configurable circuit topology and control algorithms that adapt the filter cell's role based on system needs, allowing a single component to serve multiple purposes and reducing the need for separate dedicated filters for different functions.
Data Source
AI summary
A method includes converting power by a power converter comprising a plurality of converter cells and at least one filter cell, receiving a cell input power at a cell input and providing a cell output power at a cell output of at least one of the plurality of converter cells, and operating the filter cell in one of an input power mod, in which the filter cell receives an input power, and an output power mode, in which the filter cell provides an output power.